topic Re: swap space on linux in Operating System - Linux

swap space on linux

Ragni Singh — Thu, 05 Nov 2009 17:16:32 GMT

I have this device with this much space available and would like to create a 100g swap space.

Please tell me how I would do that?

/dev/sdb1 135G 92M 128G 1% /scratch

Thanks and points will be assigned.

Re: swap space on linux

Matti_Kurkela — Thu, 05 Nov 2009 17:42:46 GMT

Type "man mkswap". Read.

Type "man swapon". Read.

Then you'll know.

MK

Re: swap space on linux

Ragni Singh — Thu, 05 Nov 2009 18:11:20 GMT

In short,

its dd
mkswap
swapon.

Re: swap space on linux

Steven E. Protter — Thu, 05 Nov 2009 20:41:30 GMT

Shalom,

Before you go out and create this massive a swap area.

free

Post the output.

If you make a 100 GB swap area, and don't have enough memory, having this much swap space is not going to hep anything.

What is system memory? You should if you have 50 GB of ram not need 100 GB of swap space.

The old rules on this sizing do not apply to new systems with lots and lots and LOTS of RAM.

SEP

Re: swap space on linux

Nuwan Alwis — Fri, 06 Nov 2009 03:21:30 GMT

Hi Sanjit,
yes, you can extend your swap space online.
And i also agree with what SEP has said.
think before if you really need this much of swap space. Its not always prove that lager the swap you have it will add performance to your system(some times it will degrade your systems performance)

What i would do is ondemand add swap to the system by using dd.

Good Luck...!
NJ

Re: swap space on linux

Viktor Balogh — Fri, 06 Nov 2009 13:38:10 GMT

>yes, you can extend your swap space online.

no, it's not about extending, it's about adding a new swap device